GRSM20 Mikro Bass pick ups

New to the forum and seeking advise. I recently purchased an Ibanez
GRSM20 Mikro bass for fooling around with. Actually it's not a bad guitar but some things need to be upgraded. I would like to start with the pick ups then later change the bridge.

Any info as to what pick ups could be installed that would not be a major project?
I do not want to change to active pickups.

Did change the strings. Made a little difference. Ric you are correct the bridge is
lame and the pots and knobs are cheap. I like the guitar and the fact that it weighs 7 lbs. which is great on my back. Going to make a few changes to make is better. Any suggestions on a replacement bridge?
I appreciate all the helping comments.

In one of the Mikro threads there was someone who recommended moving the bridge about 7mm away from the neck to allow for more saddle and intonation adjustment.
You might want to consider moving the bridge back if you are going to get a replacement. Ibanez makes an upgraded AccuCast bridge but I'm not sure the footprint is the sames as the stock B10.
Jeff--I am thinking of getting one of the 5 strings, which have 2 J pickups. What do you recommend as a medium priced replacement pickup ? I am considering the DiMarzios and Bartolinis. Thanks